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Dermatological agent
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Topical anesthetic
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Postherpetic neuralgia
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1. Adults: Apply to intact skin, covering most painful area. May apply up to 3 patches at once for up to 12 hours of a 24-hour period. 2. Children: Not recommended.
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Category B
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Local effects (e.g., erythema, edema), allergic reactions (e.g., urticaria, angioedema, bronchospasm)
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Pregnancy Risk Categories defined:
A: Studies in pregnant women failed to show a risk to the fetus in the first
trimester - with no evidence of risk in the later trimesters.
B: Animals studies indicate no adverse effect to the fetus, but there are no adequate,
clinical studies in pregnant women.
C: Animal studies have shown an adverse effect on the fetus, but there are no adequate,
clinical studies in humans. Despite potential risks, the drug may be useful in pregnant
women.
D: There is evidence of risk to the human fetus, but the potential benefits of use in
pregnant women may be acceptable, despite potential risks.
X: Studies in animals or humans show fetal abnormalities, or adverse reaction reports
indicate evidence of fetal risk. Warning: the risks involved clearly outweigh any
potential benefit from using the drug in pregnant women, regardless of trimester.
NR: Not rated (i.e., no information available at this time as to the potential
risks or benefits).
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